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[Bug bootstrap/52391] [4.7/4.8 regression] genattrtab almost 5X slower for m68k than in 4.6 and earlier releases
- From: "steven at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Sat, 05 May 2012 10:13:48 +0000
- Subject: [Bug bootstrap/52391] [4.7/4.8 regression] genattrtab almost 5X slower for m68k than in 4.6 and earlier releases
- Auto-submitted: auto-generated
- References: <bug-52391-4@http.gcc.gnu.org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52391
--- Comment #13 from Steven Bosscher <steven at gcc dot gnu.org> 2012-05-05 10:13:48 UTC ---
Created attachment 27316
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=27316
Difference in insn-attrtab.c before/after applyin
PR52391_compare_IOP_tree_v1.diff
tmp-attrtab.c is *with* the patch applied, insn-attrtab.c is without patch, for
GCC trunk at r186902.
Typical difference:
$ grep m68k_sched_branch_type v1_insn-attrtab.diff | grep "^\-" | wc
116 464 4524
$ grep m68k_sched_branch_type v1_insn-attrtab.diff | grep "^\+" | wc
2360 9440 92040
If someone could help interpret the differences, I'd be very grateful. With or
without patch, insn-attrtab is a monster...